//
//  ViewController.m
//  录音机
//
//  Created by 石虎 on 2017/6/28.
//  Copyright © 2017年 shihu. All rights reserved.
//*****************  录音机  ******************

#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>

@interface ViewController ()<AVAudioRecorderDelegate>
{
    AVAudioRecorder *_audioRecoder;//音频录音机
    AVAudioPlayer *_avplayer;//音频播放器
    NSTimer *_timer; //定时器
    int      _count; //保存数量
    BOOL     _isSwitch;//是否开关
}

//开始录制属性
@property (weak, nonatomic) IBOutlet UIButton *btnStart;
//显示时间
@property (weak, nonatomic) IBOutlet UILabel *showTime;
//回放属性
@property (weak, nonatomic) IBOutlet UIButton *btnPlayBack;
//文件路径
@property (nonatomic , copy) NSString *documentsPath;

//开始录制
- (IBAction)startRecording:(id)sender;
//停止录制
- (IBAction)stopRecording:(id)sender;
//回放录音
- (IBAction)playBackRecording:(id)sender;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    _isSwitch = YES;
}

//开始录制
- (IBAction)startRecording:(id)sender {
    //判断录音控制器是否为空或者正在录制；
    if (_audioRecoder==nil && _audioRecoder.isRecording)
    {
        //设置控制器停止录制；
        [_audioRecoder stop];
        //设置按钮的标题为开始录制；
        [_btnStart setTitle:@"开始录制" forState:UIControlStateNormal];
        [_timer invalidate];
        _timer = nil;

    }else{
        _count = 0;
        _timer = [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(repeatShowTime:) userInfo:@"admin" repeats:YES];
        
#pragma mark 下面设置录音的参数和录音文件的保存路径等信息
        //获取音频文件的保存路径
        NSString *destinationStr = [[self documentsPath] stringByAppendingPathComponent:@"sound.wav"];
        NSURL *destinationUrl = [NSURL fileURLWithPath:destinationStr];
        //创建一个Dictionary，用于保存录制属性
        NSMutableDictionary *recordSettings = [[NSMutableDictionary alloc] init];
        //设置录制音频的格式
        [recordSettings setObject:[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
        //设置录制音频的采样率
        //        [recordSettings setObject:[NSNumber numberWithFloat:@"1".floatValue] forKey:AVSampleRateKey];
        //设置录制音频的通道数
        [recordSettings setObject:[NSNumber numberWithInt:(_isSwitch = /* DISABLES CODE */ (YES) ? 2:1)] forKey:AVNumberOfChannelsKey];
        //设置录制音频采用高位优先的记录格式
        [recordSettings setObject:[NSNumber numberWithBool:YES] forKey:AVLinearPCMIsBigEndianKey];
        //设置采样信号采用浮点数
        [recordSettings setObject:[NSNumber numberWithBool:YES] forKey:AVLinearPCMIsFloatKey];
        NSError *recorderSetupError = nil;
        
#pragma mark 到这里开始实例化录音对象
        //初始化AVAudioRecorder
        _audioRecoder = [[AVAudioRecorder alloc] initWithURL:destinationUrl settings:recordSettings error:&recorderSetupError];
        _audioRecoder.delegate = self;
        [_audioRecoder record];
        //设置单个按钮的状态为录音
        [_btnStart setTitle:@"正在录音" forState:UIControlStateNormal];
    }
}

//停止播放
- (IBAction)stopRecording:(id)sender {
    
    [_audioRecoder stop];
    [_btnStart setTitle:@"开始录制" forState:UIControlStateNormal];
    //设置计时器为初始值；
    if (_timer) {
        [_timer invalidate];
        _timer = nil;
    }
    _count = 0;
    _showTime.text = @"00:00";
}

//回放录音
- (IBAction)playBackRecording:(id)sender {
    
    //获取音频文件的保存路径
    NSString *destinationString = [[self documentsPath] stringByAppendingPathComponent:@"sound.wav"];
    NSURL *url = [NSURL fileURLWithPath:destinationString];
    //创建AVAudioPlayer对象
    _avplayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    //开始播放
    [_avplayer play];
    _btnPlayBack.backgroundColor=[UIColor greenColor];
    
}

//获取Documents目录路径
-(NSString *)documentsPath{
    
    if (!_documentsPath) {
        
        NSArray *searchPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        _documentsPath = searchPath[0];
        
    }
    
    return _documentsPath;
}

#pragma mark- 录制音频的代理方法
- (void)audioRecorderBeginInterruption:(AVAudioRecorder *)recorder
{
    NSLog(@"---->被中断！");
}
- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)aRecorder successfully:(BOOL)flag
{
    if(flag)
    {
        NSLog(@"---->录制完成！！");
    }
}
- (void)repeatShowTime:(NSTimer *)tempTimer {
    
    _count++;
    //设置在文本框上显示时间；
    _showTime.text = [NSString stringWithFormat:@"%02d:%02d",_count/60,_count%60];
}

- (void)dealloc {   //销毁NSTimer</span>
    if (_timer) {
        [_timer invalidate];
        _timer = nil;
    }
}

@end
